<van-sidebar  active-key="{{ activeKey }}" bind:change="onChange">                 <van-sidebar-item title="农家水果" custom-class="cellTab" />                 <van-sidebar-item title="农家蔬菜" custom-class="cellTab"/>                 <van-sidebar-item title="自种茶叶" custom-class="cellTab"/>                 <van-sidebar-item title="加工零食" custom-class="cellTab"/>                 <van-sidebar-item title="加工饮料" custom-class="cellTab"/>                 <van-sidebar-item title="加工调料" custom-class="cellTab"/>        </van-sidebar> 随后在js文件中编写onChange（event），其中event.detail即对应导航栏块的索引。以event.detail作switch参数，在case中通过this.setData设置右侧区域内容。 onChange(event) {     switch(event.detail){       case 0:         this.setData({           goods:[             {               price:"5.6元/斤",               tag:"热销",               title:"农家大橘子",               image:"../myImage/orange.webp",               value:"5"             },             {               price:"6.6元/斤",               tag:"新品",               title:"农家大香蕉",               image:"../myImage/banana.webp",               value:"4"             }           ]         });         break;         case 1:           this.setData({             goods:[               {                 price:"5.6元/斤",                 tag:"热销",                 title:"农家白菜",                 image:"../myImage/vegetable.webp",                 value:"5"               },               {                 price:"6.6元/斤",                 tag:"新品",                 title:"农家西红柿",                 image:"../myImage/tomato.webp",                 value:"4"               }             ]           })     }   } https://blog.csdn.net/dmyc1027/article/details/124834166 这个例子只讲了左侧的导航，右侧的内容要怎么写，才能显示出来 。 [图片]